JLC 494

Update

Basic Information

NameJLC 494
ManufacturerJaeger-LeCoultre
Launch Year1938
Caliber FamilyDescription
449, 452, 463, 469, 479: sub second
450, 468, 470, 478: sweep second
451, 464, 484: sub second, calendar
488: sweep second, hack feature
494: sub second, calendar, moon phase

Related calibers
JLC 449, JLC 450, JLC 451, JLC 452, JLC 463, JLC 464, JLC 468, JLC 469, JLC 470, JLC 478, JLC 478/BWSbr, JLC 479, JLC 484, JLC 488, JLC 494
Is COSC certifiedNo

Technical Details

Lignes Dimensions12.75 ‴
Dimensions28.8 mm
Height5.25 mm
Further MeasuresMounting Diameter (Dm): 28.8mm
Power Reserve40 hours
Frequency18,000 vph
Jewels15

Complications and Specifications

ShapeRound
Complications
  • Sub Second
  • Day
  • Date
  • Month
  • Moon Phase
Regulator TypePinned Regulator (or Index Regulator)
Movement TypeManual
Escapement TypeSwiss Lever
Control TypeBalance Wheel
Winding TypeStem Winding (Crown)
Setting TypeStem Set (Crown Pull)

Additional Information

Hand Sizes1.30 x 0.80mm
Hand Count3
Country Of Manufacture(not set)
NotesRemarks: options: Breguet hairspring*, separate escape-wheel cock**, shock protection**
(* scarcely or never, ** often or always)
Assignment troubles:
Flume lists 3 balance staffs assigned to calibres, Ronda lists 4 staffs for all calibres, LeCoultre data sheets mention no differences.
Calibres specified in data sheet with shock protection are occasionally met without.
Calibres specified in data sheet with optional shock protection are never met without.
Other data: balance staff: U877 (U1814, U2861) Flume: 3 Wellen, Ronda: 4 Wellen, LeCoultre: keine Angaben stem: W903 mainspring / battery: 1.28 x 11.5 x 0.13 x 420mm
Signature1938: 301499, Jaeger-LeCoultre (LeCoultre 469)
Import Codes

Metadata

Created AtSep 15, 2023
Updated AtJan 28, 2024, 9:00:17 PM